Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, read the RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
VERIFICATION WITH DIAGNOSTIC TOOLS
1. With the scan tool select the Radio Frequency Hub (RF Hub) Module.
2. Check the "BUX Deactivation Flag " status.
  Does the BUX Deactivation Flag status show set?
  
  Yes
  - Verify that after market rims (without TPM sensors installed) are being used.
  No
  - Go To 3
CHECK FOR ADDITIONAL DTCS IN THE RF HUB
1. Visually inspect the wheels for any non-FCC compliant components. Check that the TPMS fault indicator on instrument panel is not constantly ON
2. Check the Vehicle Scan Report for any of the following type DTC faults to be active: C1501-XX, C1502-XX, C1503-XX & C1504-XX.
  NOTE:
  The 'XX' value is equal to 07, 16 or 64 type faults that can be set.)
  
  Were there any active type DTCs present?
  
  Yes
  - Diagnose and repair any related DTCs before continuing with this procedure
  No
  - Go To 4
CHECK POWER AND GROUND TO THE RF HUB
1. Disconnect the Radio Frequency Hub (RF Hub) Module C1 harness connector.
2. Test the (A901) Fused B(+) circuit for high resistance by connecting a 12-volt test light between the Fused B(+) circuit and the (Z906) Ground circuit at the RF Hub C1 harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Test the (A901) Fused B(+) and the (Z906) Ground circuits to determine which one has the high resistance. Repair the (A901) Fused B(+) circuit or the (Z906) Ground circuit for high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all RF Hub harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all RF Hub Module harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Vehicle Scan Report, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read RF Hub DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Radio Frequency Hub (RF Hub) Module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - If this vehicle is equipped with a Steering Column Lock Module (BUX), it must also be replaced in accordance with the Service Information. When replacing the RF-Hub and the Steering Column Lock Module, the RF-Hub MUST be programmed BEFORE the Steering Column Lock Module (ELV) is programmed.
  - Replace the Steering Column Lock Module (ELV/ESCL) in accordance with the Service Information.
  - Perform the TPM SENSOR VERIFICATION TEST. Refer to TPM SENSOR VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.